Touch screen unresponsive when 'double tap to swap screen'

Hello.  I love duo so much but this is so annoying And I tried everything like factory reset but cannot resolved. 

using duo with smartphone mode, I'm usually using right screen, and when left screen say 'double tap to swap screen', suddenly Half of right screen(left side) is unresponsive.

It means Cannot type Q, W, A, S, Z, D until that 'double tap to..' Dissapear. Almost 5 seconds. 

It is opposite with left screen. Cannot use Half of screen (but right side this time) so I cannot type P, L, M, O, K. 

But certainly, It is not matter of screen size I think Because 

I changed size and moved swift keyboard to End of right side

But stil cannot type Q, W, A, S, Z. D. 

.. Seriously, What is wrong with duo?

I don't know why but after recent patch duo always saying double tap to swap screen even I do not want to swap screen so almost of time I cannot use half of screen when I using smart phone mode now. It is extremely fraustraing so I really hope fix this. Is anyone there solved this problem?